import { Router } from 'express'
import { prisma } from '../db.js'
import { authRequired } from '../middleware.js'

const router = Router()
router.use(authRequired)

// 报警列表: 按时间最新优先, cursor 分页 (cursor = id)
router.get('/alerts', async (req, res, next) => {
  try {
    const limit = Math.min(Number(req.query.limit) || 10, 50)
    const cursor = req.query.cursor ? Number(req.query.cursor) : null
    const where = cursor ? { id: { lt: cursor } } : {}
    const items = await prisma.alert.findMany({
      where,
      orderBy: { id: 'desc' },
      take: limit,
    })
    const nextCursor = items.length === limit ? String(items[items.length - 1].id) : null
    res.json({ items, nextCursor })
  } catch (e) { next(e) }
})

export default router